【摘要】 研究逆铣加工过程动态特性,建立其铣削微元单位瞬态切削力、刀具偏心和再生振动引起的切削厚度数学模型.基于再生振动机理和相位特性研究,完成立铣加工过程消耗能量分析.研究结果表明:当前后2次铣削波纹间相位差值为π/2和3π/2时,加工过程将分别趋向于最稳定和最不稳定的工作状态.基于此原理提出的加工过程主轴转速和刀具齿数优化选择策略可有效避免较大加工振动的出现.更多还原

【Abstract】 Mathematical models of cutting force,cutter deflection and cutting thickness resulted from regenerative chatter of an instant milling unit are deduced by studying on dynamics charcaters of up milling process.Energy consumed during the process are analyzed on the basis of investigation on regenerative chatter theory and phasic character.The conclusions demonstrate that stability of the milling process will separately tend to be the best or the worst state when phase margin between adjacent milling ripples is(π/2) or 3π/2.The spindle speed and cutter teeth are optimized with the mechanism to avoid milling chatter effectively.更多还原